Yeah, challenges are largely about time invested. Some people like twistah think that this makes RR challenges useless, but it's basically the same principle as practicing to improve, they both cost time and effort. I'm glad to see closer and closer times, and I'd be more than happy to see a time that I truly can't beat, although my brain wouldn't allow me to leave such a time alone ;0.
I don't mind people being suspicious of me, but there's nothing that I could possibly be using. You're free to send any replay to Cybershadow or Deadcode to test for x-speed, beyond that, there's just double tapping macros, but if you look at finger rollers, I'd think you'd be able to see that my taps aren't quite as fast. FR taps usually have a 2 or 3 frame delay, most of my taps are maybe 4 frames, though I can sometimes exceed that in short bursts. I'll try to record a video with my iPod touch though.
Ahem Ramone, Dario and I are pretty closely matched, for example I beat him in the finals of both the last two ONL playoffs, and in the finals of the Jakka's recent cup, though he's beaten me plenty before.